Improvement in piston-rod packings



W HARTLEY PIsToN ROD PACKING.

Y Patented Dec. 13, 1870.

@i-niiet 'y tiria tieni ffice.

WILLIAMInterner, or Roon-FORD. ILLINOIS.

Letters reame Ne. 110,035, dated December 13, 1870.

IMPROVEMENT IN PlSTON-RQD PACKINGS..

The Schedule referred u; in'thele Letters Patent and making part of the same To all whom. 'it 'mcy concern rod packing, and consists in an arrangement et' sectional metallic ringsund binding springs'in a hollow cylinder attachedto the cylinder-head, through which the rod works, the said -arrangement being such thatl the rings will be caused to bear upon the piston rod and against thc ends ofthe cylinder, to which they are nicely .litted and make steam-tight joints, while allowing the pist0n-rod to vibrate laterally as much as may be necessary'for any inaccuracy in the working of the rod.

Figure 1 isa longitudinal section through the packingcylinder and the cylinder-head of the engine;

Figure 2 is a transverse section; and i Figure 3 is an elevation of one of the rings.

Similar let-tels of reference indicate corresponding parts.

A represents the piston-rod;

B, the cylinder-heini and C, the cylinder attached to the cylinder-dread for holding the packing, which consists of the sectional metallic rings D, E, and F, and the springs S T.,

The rings D and E arecomposedv ot two sectional pieces, M, and the two piecesN, the first nearly encircling theA rod, and the latter having a plane side. O, fitting upon the ends of 'the pieces M, across the joint I, the said ends being made perpendicular to the said joint, so as to completely clos'e up the passages, from the center outward, between the said pieces M, while allowing them' to be clamped down tightly upon the rod.

The ends of these rings are made true, to t steamrings F, which are to press them against the said cylieder-ends.

lhe rings E are composed of' the two semicircular pieces Q, having ob ique peripherics, as shown clearly in fig. 1, and they are placed with the widest sides -against the rings D E, and, preferably, so that the joints lt will be about midway between the ends of the pieces M, s'dothat they prevent the steam lfrom esL 'caping at the ends ofthe rings D or E.

'lhe'saidrings F areplaced side by side between the rings D le" so that the two oblique faces form a groove, in which is placed the packingfspring S, which,

acting ontlie said b'ii'que faces, has a tendencytoV move the rings F from eachother, thereby imparting an end pressure on the rings DE, which presses them against then' respective ends'of the packing-cylinder.

The rings `D E are conlined around tbe rod-by the springs 'l,'as clearly as shown.

lt will be seen that, by-th-is `arrangement of ,the packing-rings and springs, the steam will be'effectually prevented from escaping through the end Uof the packing-cylimler; also,that the said packing'otlcrs no 'material resistance to the lateral vibration ot' the piston-rod.

'.lhe packing-cylinder may be attachedv to tlie`cy1in' piston-rod, of the sectional metallic rings D, E, and

F, and the springs S and T, all substuntially'as specified;

Witnesses:

DUNCAN FERGUSON, MARCUS S. PARMELE.'

WILLIAM HARTLEY. 

